PcrA

• Description: ATP-dependent DNA helicase, facilitates unwinding of ICEBs1 DNA for horizontal transfer
  
  

Gene name	pcrA
Synonyms	yerF
Essential	yes PubMed
Product	ATP-dependent DNA helicase
Function	plasmid rolling-circle replication, conjugative transfer of ICEBs1
MW, pI	83 kDa, 5.767
Gene length, protein length	2217 bp, 739 aa
Immediate neighbours	pcrB, ligA
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU06610

Phenotypes of a mutant

essential PubMed

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity:
  • PcrA anchors itself to the template duplex using the 2B subdomain and reels in the lagging strand, extruding a single-stranded loop PubMed
  • dismantles RecA filaments PubMed

• Protein family: uvrD-like helicase C-terminal domain (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions: YxaL-PcrA PubMed, YerB-PcrA PubMed, YwhK-PcrA PubMed

• Localization:

Database entries

• Structure: 2PJR (product complex, complex with sulphate ion, Geobacillus stearothermophilus), 1PJR (substrate complex, complex with DNA, Geobacillus stearothermophilus)

• UniProt: O34580

• KEGG entry: [3]

• E.C. number:

Expression and regulation

• Operon: pcrB-pcrA-ligA-yerH PubMed

• Sigma factor:

• Regulation:
  • induced by DNA damage (LexA) PubMed

• Regulatory mechanism:
  • LexA: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Original Publications

Jeehae Park, Sua Myong, Anita Niedziela-Majka, Kyung Suk Lee, Jin Yu, Timothy M Lohman, Taekjip Ha
PcrA helicase dismantles RecA filaments by reeling in DNA in uniform steps.
Cell: 2010, 142(4);544-55
[PubMed:20723756] [WorldCat.org] [DOI] (I p)

Catherine A Lee, Ana Babic, Alan D Grossman
Autonomous plasmid-like replication of a conjugative transposon.
Mol Microbiol: 2010, 75(2);268-79
[PubMed:19943900] [WorldCat.org] [DOI] (I p)

Ye Yang, Shuo-Xing Dou, Hua Ren, Peng-Ye Wang, Xing-Dong Zhang, Min Qian, Bing-Yi Pan, Xu Guang Xi
Evidence for a functional dimeric form of the PcrA helicase in DNA unwinding.
Nucleic Acids Res: 2008, 36(6);1976-89
[PubMed:18276648] [WorldCat.org] [DOI] (I p)

Syam P Anand, Haocheng Zheng, Piero R Bianco, Sanford H Leuba, Saleem A Khan
DNA helicase activity of PcrA is not required for the displacement of RecA protein from DNA or inhibition of RecA-mediated strand exchange.
J Bacteriol: 2007, 189(12);4502-9
[PubMed:17449621] [WorldCat.org] [DOI] (P p)

Nora Au, Elke Kuester-Schoeck, Veena Mandava, Laura E Bothwell, Susan P Canny, Karen Chachu, Sierra A Colavito, Shakierah N Fuller, Eli S Groban, Laura A Hensley, Theresa C O'Brien, Amish Shah, Jessica T Tierney, Louise L Tomm, Thomas M O'Gara, Alexi I Goranov, Alan D Grossman, Charles M Lovett
Genetic composition of the Bacillus subtilis SOS system.
J Bacteriol: 2005, 187(22);7655-66
[PubMed:16267290] [WorldCat.org] [DOI] (P p)

M-F Noirot-Gros, P Soultanas, D B Wigley, S D Ehrlich, P Noirot, M-A Petit
The beta-propeller protein YxaL increases the processivity of the PcrA helicase.
Mol Genet Genomics: 2002, 267(3);391-400
[PubMed:12073041] [WorldCat.org] [DOI] (P p)

P Soultanas, M S Dillingham, P Wiley, M R Webb, D B Wigley
Uncoupling DNA translocation and helicase activity in PcrA: direct evidence for an active mechanism.
EMBO J: 2000, 19(14);3799-810
[PubMed:10899133] [WorldCat.org] [DOI] (P p)

M A Petit, E Dervyn, M Rose, K D Entian, S McGovern, S D Ehrlich, C Bruand
PcrA is an essential DNA helicase of Bacillus subtilis fulfilling functions both in repair and rolling-circle replication.
Mol Microbiol: 1998, 29(1);261-73
[PubMed:9701819] [WorldCat.org] [DOI] (P p)